74.4286
7 divided by 521 is 0.0134357005758
74.42857
744
521
0.0038
104.2
521
0.0058
0.0115
7.137
You must drive at 521/7 mph.
52.3333
0.0173
There are 7 days in a week so there are 3647 days in 521 weeks. There are about 365.256 days in a year so 521 weeks is about 9.98 years.
speed limit 50 = 1 hour 521 divided by 50 = 10 hours and 21 minutes